<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>eveal函数</title>
		<script>
			var w="alert(4+6)";
			eval(w);
			var a=40,b=100;
			var s2="a+b";
			var c=eval(s2);
			alert(c);
		</script>
	</head>
	<body>
	</body>
</html>